April Fools' Day or All Fools' Day is a day celebrated in many countries on April 1. The day is marked by the commission of hoaxes and other practical jokes of varying sophistication on friends, family members, enemies, and neighbors, or sending them on a fool's errand, the aim of which is to embarrass the gullible. Practical jokes,hoaxes and pranks on April 1 in the form of merriment and seemingly initation in many groups both formal and informal.